Governor



(No Model.)

P. D. OUMMER.

GOVERNOR.

Patented Deo. 9; 1884.

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' Partnr @risica FRANKLIN D. CUMMER, OF CLEVELAND, OHI.

GOVERNOR.

'GATIGEQ inf-ing part of Letters Patent No. 309,135, dated December 9, 1884.

Application tiled January 9.3, 1994. (No model.)

To (LZ/Z, 1071/0711/ t may concer/2,:

Bc it known that I, FRANKLIN D. Coun En, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Governors; and 'I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in that class ofgovernors that ha ve flying weights.

The object of my invention is to provide Ya single spring that will furnish such centripetal force as may be required in 'counteracting the centrifugal force of all of the ilying weights, and so arranged that the spring will exert the saine force on each weight. A further object is to provide convenient mechanism for ad- `justing the spring so that the engine may be governed at any normal speed that is required.

lVith these objects in view my invention consists in certain features of construction and in combination of parts hereinafter described, and pointed out in the claims.

Heretofore where springs were used on this class of governors a separate spring was provided to operate each weight. lt was found inipracticablc to construct springs of such equal temper, elasticity, and force, and to so nicely adjust the tension of each that the weights in all parts of their respective throw would be acted upon alike by their respective springs. lf an equal adjustment of the spring could be made, there would be no assurance that the elasticity and tension of the different springs would remove the same or would change alike. lf have therefore invented mechanism by means of whichY one spring furnishes the centripetal force and operates alike on all of the weights under all circumstances.

In the accompanying drawings, Fig'iirc l is a vertical section of my improved governor. Fig. 2 is a side elevation of the casing and some of the attachments, with a portion of the casing broken away to show one of the weights.

The shaft, &c., are shown in cross-section.

A represents a hollow shaft provided with the eccentric a, that operates the main valve. The shaft is journaled in the boxes b and c, the former attached to engine-guider 3 and the latter supported by the standard C.

D is a sleeve journaled on the shaft A and provided with the eccentric d,that operates the cutoff valve.

E is an annular case, attached to the shaft A, in which are secured and operated the flying weightsuil. These weights are pivotally attached at el to the case, and their free ends are respectively"connected by the rods e to opposite sides ofthe sleeve D, so that every change ofthe weights in their radial distance from the shaft will slightly turn the sleeve on the shaft and var vlthe relative positions ofthe eccentric d. 'lhe position of the parts is such that when the weights ily outward the sleeve D and the eccentric d are turned in the direction that cuts off steam sooner from the engine, and when the weights are drawn inward the said sleeve and eccentric are turned in the opposite direction and admit more steam tothe engine. The rods c are at one end pivotally attached to the central portion of the weights, and at the other end are pivotally attached to one end of the bell-cranks F. These rods are preferably made adjustable in length by means, for instance, of a turnbuckle or other suitable device, and should have universal]- oints at each end to accommodate themselves to the motion of the weight and bell-crank, that move in planes that are at right angles to each other. rlhe bell-cranks arc fulcrumed at and at their inner ends are connected by the links g to the equalzing-beam At the center of this beam is a notch that engages the knifeedge i of the hook l1, that is attached to the end of the spring l. To the other end of the spring is secured the sliding block l, that is an easy iit in the bore ot' the shaft A. This block has a central hole threaded and forming a nut for the screw-rod J. rlhis rod is journalcd in the cup k, that is secured to the end of the shaft. The outer end of the rod J should be provided with a bandavheel or some convenient device for turning the rod.

L is the gear by which the shaft A is driven.

In operating the device when the rod J is turned so as to draw the nutl in the position shown tothe right hand, the tension of the spring is increased, and by means of the connections just described draws the weights toward the shaft, or exerts a centripetal force upon them, and Jthis force may be increased or diminished at pleasure by turning the screwrod J in one direction or the other.

It is evident that whatever force is exerted by the spring will be equally distributed to the two Weights; also, when the tension of the spring is increased, the Weights are drawn with greater force toward the center and to cause the Weights to fly outward in opposition to such increased resistance, it is necessary to increase the centrifugal force by increasing the speed of the shaft until the centrifugal force of the Weights overcomes the centripetal force exerted by the spring. It will be seen, therefore, that the normal speed of the engine may be regulated at pleasure by adjusting the tension of the spring.

VI do not limit myself to governors whose Weights revolve in avertical plane, as my invention is equally applicable to governors Whose weights revolve in a horizontal or an inclined plane.

What I claim is- 1. The combinatiomwith a shaft and an eccentric loosely journaled thereon, of flying Weights connected to the shaft, a spring connected by links and levers to the Weights and exerting a centripetal force thereon, and links connecting the eccentric and Weights, substantially as set forth.

2. The combination, with a `tubular shaft and an eccentric loosely journaled thereon, of

a shell or case secured to said shaft, Weights pivoted Within the case and connected to the eccentric by links, a spring located within the shaft, and devices connecting the Weights and stantially as and for the purpose set forth.

3. The combination, with a tubular shaft and an eccentric loosely journaled thereon, of a case secured to the shaft, Weights pivoted Within the case and connected to the eccentric by links, a spring locatedwithin the shaft and connected indirectly to the Weights, and devices for adjusting the tension of the spring.

4. The combination, with a tubular shaft and an eccentric loosely journaled thereon, of a case secured to the shaft, Weights pivoted within the shell and connected to the Weights by links, a spring located Within the shaft, and adjustable devices connecting the Weights and spring. all of the above parts combined, substantially as set forth. y

In testimony whereof I sign this specification, in the presence oftWo witnesses, this 12th day of January, 1884.

FRANKLIN- D. CUMMER.

Vitnesscs: C. H. DORER,

ALBERT E; LYNCH.

spring, all of the above parts combined sub- 

